New research shows that you have a finite store of this valuable cognitive currency, so spend it the smart way
EVER HEARD A DOUGHNUT CRY OUT YOUR NAME?

It happens to me every time I pass my neighborhood bakery and inhale that intoxicating, sugary smell. Most days, I'm able to resist. But sometimes, before I know it, I've broken one of my primary New Year's resolutions and stuffed two into my mouth. What happened to my willpower?